Based on Allen and Gale (1992), Aggarwal and Wu (2002), this article introduces dynamic transaction costs. So, we can comprehensively and theoretically discuss the major roles of government against stock market manipulation for the first time. First, the government should require all the related participants disseminate great and true information in time, in order to decrease the cost of intelligent investor. Second, the government should vigorously regulate the trading and discriminate the intelligent investor from manipulator to increase the manipulator’s cost. Last, in order to decrease the intelligent investor, the government also should increase the degree of investor education